.columnsitem,
.columnsitem-search {
    float: left;
    width: 25%;
}

.columnsitemin {
    margin: 0 10px 20px;
    background-color: #c2cce4;
}

.columnsitemimg {
    position: relative;
    padding-bottom: 70%;
    background-color: burlywood;
}

.columnsitemcont {
    min-height: 120px;
}

.columnsitemcont-title,
.columnsitemcont-desc {
    display: -webkit-box;
    padding: 10px 10px 0;
    min-height: 40px;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: 2;
    /* 期望展示的行数 */
    word-break: break-all;
}

.columnsitemcont-desc {
    color: #666;
}

@media (min-width:1200px) {
    .columnsitem-search {
        width: 20%;
    }
}

@media (max-width:1000px) {

    .columnsitem,
    .columnsitem-search {
        width: 33.333%;
    }
}

@media (max-width:600px) {

    .columnsitem,
    .columnsitem-search {
        width: 50%;
    }
}